measure high speed duty cycle in labview

[jackedi]

Hello.

I'm trying to do semi-period measure for high frequency (up to around 200KHz).

i need to know an exact duty cycle and frequency of the signal.

all the examples i could find worked fine for low freq. (up to 50KHz) but dont match for high speed.

for now i'm using the M series 6259 and the new X series 6353 DAQ.

is there a solution for high speed measure?

[jschwartz]

Hi jackedi

Have you tried the examples in the Example Finder?  You can find the Example Finder at Help >> Find Examples.  When this opens, double click Hardware Input and Output >> DAQmx >>  Counter Measurements >> Meas Semi-Period.  This should measure your semi period.  On the 6353, the counters run at 100 MHz, so you should be able to get good resolution of a 200 kHz signal.